Induced emf in a straight segment of wire that passes through a magnetic field depends on all of the following, except:
A. the orientation of the wire with respect to the magnetic field direction
B. its length, its resistance
C. its speed
D. the magnetic field strength
B. its length, its resistance
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Consider two copper wires. One has twice the length of the other. How do the resistances of these two wires compare?
A) Both wires have the same resistance. B) The longer wire has half the resistance of the shorter wire. C) The longer wire has twice the resistance of the shorter wire. D) none of the given answers
The fastest we could accelerate a vehicle powered with an ion engine to is approximately
A) 1% of the speed of light B) 0.001% of the speed of light C) 0.1% of the speed of light D) 10% of the speed of light
A thin-walled cylindrical tank with a diameter of 2.0 m and wall thickness of 18 mm is open at the top. The height h of water (weight density 5 9.81 kN/m3) in the tank at which the circumferential stress reaches 10 MPa in the tank wall is approximately:
(A) 14 m
(B) 18 m
(C) 20 m
(D) 24 m
Why do some radio galaxies appear to have lobes while some do not?
What will be an ideal response?